'g2s_cuda.so' is missing

[cgotelli]

Hello,
I have a problem during the installation of G2S on Ubuntu WSL for Windows 10. I am receiving the following message when I install it manually from build/c++-build/install.bat:

make[1]: Entering directory '/mnt/c/Users/EPFL-LHE/Desktop/MPS/G2S-master/build/c++-build'
Creation of /usr/local if needed
cp: cannot stat './g2s_cuda.so': No such file or directory
warning: 'g2s_cuda.so' is missing, this is probably due to the absance of CUDA compiler.
Installation c++ finished!
make[1]: Leaving directory '/mnt/c/Users/EPFL-LHE/Desktop/MPS/G2S-master/build/c++-build'

I have installed CUDA both for Windows 10 and for WSL-Ubuntu, available at this link.
Do you have any idea of what could be causing this missing library? I checked and the GPU is not being used when I run some tests from Matlab 2023.
Thank you very much in advance for your help.
Best,
Clemente Gotelli

[mgravey]

So normally it is functional, just because you cannot use CUDA, it will use the CPU instead.

First question you want/need to use CUDA ? Like under 1000x1000pixel simulation/TI, it's usually not interesting. Just that you know before losing time with it.

In WSL, do you have CUDA in your path ? are the commands nvidia-smi and nvcc working ?

Normally, the brew (linuxbrew in this case) install includes this library. But if CUDA is not in the path, it will still not work.

Best,
Mathieu

[cgotelli]

Thanks for your answer!
I checked the 'nvidia-smi' and 'nvcc --version' commands, and both work.

Mon Jul 24 13:04:47 2023
+---------------------------------------------------------------------------------------+
| NVIDIA-SMI 535.86.01              Driver Version: 536.67       CUDA Version: 12.2     |
|-----------------------------------------+----------------------+----------------------+
| GPU  Name                 Persistence-M | Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp   Perf          Pwr:Usage/Cap |         Memory-Usage | GPU-Util  Compute M. |
|                                         |                      |               MIG M. |
|=========================================+======================+======================|
|   0  NVIDIA GeForce GTX 1080        On  | 00000000:01:00.0  On |                  N/A |
|  0%   54C    P2              42W / 210W |   2327MiB /  8192MiB |      0%      Default |
|                                         |                      |                  N/A |
+-----------------------------------------+----------------------+----------------------+

+---------------------------------------------------------------------------------------+
| Processes:                                                                            |
|  GPU   GI   CI        PID   Type   Process name                            GPU Memory |
|        ID   ID                                                             Usage      |
|=======================================================================================|
|    0   N/A  N/A        23      G   /Xwayland                                 N/A      |
+---------------------------------------------------------------------------------------+

 nvcc --version
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2021 NVIDIA Corporation
Built on Thu_Nov_18_09:45:30_PST_2021
Cuda compilation tools, release 11.5, V11.5.119
Build cuda_11.5.r11.5/compiler.30672275_0

I re-launched the install.bat file from the original zip, and I get the same error. I also tried with the brew installation, but I could not make it work because I got this error:

==> Fetching open-geocomputing/brew/g2s
==> Downloading brew-bottles.open-geocomputing.org//g2s-0.98.018.x86_64_linux.bottle.1.tar.gz
Already downloaded: /home/cmgotelli/.cache/Homebrew/downloads/a656b95617bd3460d1933b6bdcb4f00ffcc8b82862b0258081249ec6d5fb58f7--g2s-0.98.018.x86_64_linux.bottle.1.tar.gz
==> Installing g2s from open-geocomputing/brew
==> Pouring g2s-0.98.018.x86_64_linux.bottle.1.tar.gz
cp: cannot create regular file '/home/linuxbrew/.linuxbrew/Cellar/g2s/./0.98.015/bin/g2s': Permission denied
Error: Failure while executing; `/usr/bin/env cp -pR /tmp/d20230724-2712-yp193n/g2s/. /home/linuxbrew/.linuxbrew/Cellar/g2s` exited with 1. Here's the output:
cp: cannot create regular file '/home/linuxbrew/.linuxbrew/Cellar/g2s/./0.98.015/bin/g2s': Permission denied

Ideally, I would like to use images bigger than 1000 by 1000, then check if it's worth it.

Thanks again for your time :)

[mgravey]

Both issues are weird! let me contact you my email.

[mgravey]

I don't really know from where the bug is from.
To any reader of this issue: if you have the same issue, please feel free to reopen it.